Plot synopsis: Xiaowei disappeared, and the divorced couple began to search for their son's whereabouts. With a photo of Xiaowei's injury, they found Wang Hao, the young man who was carrying the secret. Following the clues left by Xiao Wei, we discover step by step the unknown side of Xiao Wei; Xiao Wei still has not come back, but every moment everyone lives, it is as if Xiao Wei has never left.